Apache CXF实战之五 压缩Web Service数据

在现实应用中有些时候会有比较大的数据对象需要传输，或者在一个比较慢的网络环境下发布调用web service，此时可以通过压缩数据流的方式来减小数据包的大小，从而提高web service的性能。下面来看看怎样来做到这一点。

1. 首先模拟一个可以存放大数据的pojo对象，这个对象可以通过构造参数给定的size来模拟一个size大小的字符串。

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1. package com.googlecode.garbagecan.cxfstudy.compress; 
2.  
3.  
4. public class BigData { 
5.      
6.     private String name; 
7.      
8.     private String data; 
9.      
10.     public BigData() { 
11.          
12.     } 
13.      
14.     public BigData(String name, int size) { 
15.         this.name = name; 
16.         StringBuilder sb = new StringBuilder(); 
17.         for (int i =0; i < size; i++) { 
18.             sb.append("0"); 
19.         } 
20.         this.data = sb.toString(); 
21.     } 
22.  
23.     public String getName() { 
24.         return name; 
25.     } 
26.  
27.     public void setName(String name) { 
28.         this.name = name; 
29.     } 
30.  
31.     public String getData() { 
32.         return data; 
33.     } 
34.  
35.     public void setData(String data) { 
36.         this.data = data; 
37.     } 
38. } 

package com.googlecode.garbagecan.cxfstudy.compress;public class BigData {        private String name;        private String data;        public BigData() {            }        public BigData(String name, int size) {        this.name = name;        StringBuilder sb = new StringBuilder();        for (int i = 0; i < size; i++) {            sb.append("0");        }        this.data = sb.toString();    }    public String getName() {        return name;    }    public void setName(String name) {        this.name = name;    }    public String getData() {        return data;    }    public void setData(String data) {        this.data = data;    }}

2. Web Service接口类，和普通的接口定义没有什么区别。

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1. package com.googlecode.garbagecan.cxfstudy.compress; 
2.  
3. import javax.jws.WebMethod; 
4. import javax.jws.WebParam; 
5. import javax.jws.WebResult; 
6. import javax.jws.WebService; 
7.  
8. @WebService 
9. public interface BigDataService { 
10.      
11.     @WebMethod 
12.     @WebResult BigData getBigData(@WebParam String name,@WebParam int size); 
13. } 

package com.googlecode.garbagecan.cxfstudy.compress;import javax.jws.WebMethod;import javax.jws.WebParam;import javax.jws.WebResult;import javax.jws.WebService;@WebServicepublic interface BigDataService {        @WebMethod    @WebResult BigData getBigData(@WebParam String name, @WebParam int size);}

3. Web Service实现类

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1. package com.googlecode.garbagecan.cxfstudy.compress; 
2.  
3. public class BigDataServiceImplimplements BigDataService { 
4.     public BigData getBigData(String name,int size) { 
5.         BigData bigData = new BigData(name, size); 
6.         return bigData; 
7.     } 
8. } 

package com.googlecode.garbagecan.cxfstudy.compress;public class BigDataServiceImpl implements BigDataService {    public BigData getBigData(String name, int size) {        BigData bigData = new BigData(name, size);        return bigData;    }}

4. 测试类，这片文章使用了JUnit测试类来做测试。setUpBeforeClass方法用来启动Service, testGetBigData方法用来测试web service。

注意setUpBeforeClass方法中的

    factoryBean.getInInterceptors().add(new GZIPInInterceptor());

    factoryBean.getOutInterceptors().add(new GZIPOutInterceptor());

和testGetBigData方法中的

    endpoint.getInInterceptors().add(new GZIPInInterceptor());

    endpoint.getOutInterceptors().add(new GZIPOutInterceptor());

上面两段代码就是告诉CXF使用压缩Interceptor来压缩和解压缩数据包。

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1. package com.googlecode.garbagecan.cxfstudy.compress; 
2.  
3. import org.apache.cxf.endpoint.Client; 
4. import org.apache.cxf.endpoint.Endpoint; 
5. import org.apache.cxf.frontend.ClientProxy; 
6. import org.apache.cxf.interceptor.LoggingInInterceptor; 
7. import org.apache.cxf.interceptor.LoggingOutInterceptor; 
8. import org.apache.cxf.jaxws.JaxWsProxyFactoryBean; 
9. import org.apache.cxf.jaxws.JaxWsServerFactoryBean; 
10. import org.apache.cxf.transport.http.gzip.GZIPInInterceptor; 
11. import org.apache.cxf.transport.http.gzip.GZIPOutInterceptor; 
12. import org.junit.Assert; 
13. import org.junit.BeforeClass; 
14. import org.junit.Test; 
15.  
16. public class BigDataServiceTest { 
17.  
18.     private staticfinal String address = "http://localhost:9000/ws/compress/bigDataService"; 
19.      
20.     @BeforeClass 
21.     public staticvoid setUpBeforeClass() throws Exception { 
22.         JaxWsServerFactoryBean factoryBean = new JaxWsServerFactoryBean(); 
23.         factoryBean.getInInterceptors().add(new LoggingInInterceptor()); 
24.         factoryBean.getOutInterceptors().add(new LoggingOutInterceptor()); 
25.         factoryBean.getInInterceptors().add(new GZIPInInterceptor()); 
26.         factoryBean.getOutInterceptors().add(new GZIPOutInterceptor()); 
27.          
28.         factoryBean.setServiceClass(BigDataServiceImpl.class); 
29.         factoryBean.setAddress(address); 
30.         factoryBean.create(); 
31.     } 
32.  
33.     @Test 
34.     public void testGetBigData() { 
35.         JaxWsProxyFactoryBean factoryBean = new JaxWsProxyFactoryBean(); 
36.         factoryBean.setAddress(address); 
37.         factoryBean.setServiceClass(BigDataService.class); 
38.         Object obj = factoryBean.create(); 
39.          
40.         Client client = ClientProxy.getClient(obj); 
41.         Endpoint endpoint = client.getEndpoint(); 
42.         endpoint.getInInterceptors().add(new GZIPInInterceptor()); 
43.         endpoint.getOutInterceptors().add(new GZIPOutInterceptor()); 
44.          
45.         BigDataService service = (BigDataService) obj; 
46.         Assert.assertNotNull(service); 
47.          
48.         String name = "my big data"; 
49.         int size = 1024 * 1024 *10; 
50.          
51.         long start = System.currentTimeMillis(); 
52.         BigData bigData = service.getBigData(name, size); 
53.         long stop = System.currentTimeMillis(); 
54.         System.out.println("Time: " + (stop - start)); 
55.          
56.         Assert.assertNotNull(bigData); 
57.         Assert.assertEquals(name, bigData.getName()); 
58.         Assert.assertEquals(size, bigData.getData().length()); 
59.     } 
60. } 

package com.googlecode.garbagecan.cxfstudy.compress;import org.apache.cxf.endpoint.Client;import org.apache.cxf.endpoint.Endpoint;import org.apache.cxf.frontend.ClientProxy;import org.apache.cxf.interceptor.LoggingInInterceptor;import org.apache.cxf.interceptor.LoggingOutInterceptor;import org.apache.cxf.jaxws.JaxWsProxyFactoryBean;import org.apache.cxf.jaxws.JaxWsServerFactoryBean;import org.apache.cxf.transport.http.gzip.GZIPInInterceptor;import org.apache.cxf.transport.http.gzip.GZIPOutInterceptor;import org.junit.Assert;import org.junit.BeforeClass;import org.junit.Test;public class BigDataServiceTest {    private static final String address = "http://localhost:9000/ws/compress/bigDataService";        @BeforeClass    public static void setUpBeforeClass() throws Exception {        JaxWsServerFactoryBean factoryBean = new JaxWsServerFactoryBean();        factoryBean.getInInterceptors().add(new LoggingInInterceptor());        factoryBean.getOutInterceptors().add(new LoggingOutInterceptor());        factoryBean.getInInterceptors().add(new GZIPInInterceptor());        factoryBean.getOutInterceptors().add(new GZIPOutInterceptor());                factoryBean.setServiceClass(BigDataServiceImpl.class);        factoryBean.setAddress(address);        factoryBean.create();    }    @Test    public void testGetBigData() {        JaxWsProxyFactoryBean factoryBean = new JaxWsProxyFactoryBean();        factoryBean.setAddress(address);        factoryBean.setServiceClass(BigDataService.class);        Object obj = factoryBean.create();                Client client = ClientProxy.getClient(obj);        Endpoint endpoint = client.getEndpoint();        endpoint.getInInterceptors().add(new GZIPInInterceptor());        endpoint.getOutInterceptors().add(new GZIPOutInterceptor());                BigDataService service = (BigDataService) obj;        Assert.assertNotNull(service);                String name = "my big data";        int size = 1024 * 1024 * 10;                long start = System.currentTimeMillis();        BigData bigData = service.getBigData(name, size);        long stop = System.currentTimeMillis();        System.out.println("Time: " + (stop - start));                Assert.assertNotNull(bigData);        Assert.assertEquals(name, bigData.getName());        Assert.assertEquals(size, bigData.getData().length());    }}

5. 运行此unit test，可以在日志中看到数据包前后大小和内容。